Bias power device and method for adaptively adjusting pulse signal of four-quadrant detector

Abstract

The invention relates to a bias power device for adaptively adjusting a pulse signal of a four-quadrant detector. The device comprises an environment temperature detection circuit, an analog-digital converter, a controller, a pulse signal detection circuit and a bias voltage generation circuit which are connected in sequence, wherein the pulse signal detection circuit is connected with the analog-digital converter; and the bias voltage generation circuit is connected with all other parts. A closed-loop feedback system is added, so that a bias voltage value output by a bias power supply can beadjusted in real time, data distortion caused by saturation of the pulse signal is reduced, and the precision of an output target position of the four-quadrant detector is improved; and by detecting the environment temperature, the output bias voltage value is adjusted, so that the problem of response rate change of the detector caused by environment temperature change is eliminated, and the sensitive domain of the four-quadrant detector is improved.

Description

technical field [0001] The invention relates to a bias power supply device and method for a four-quadrant detector, in particular to a bias power supply device and method capable of adaptively adjusting pulse signals of a four-quadrant detector, which can be applied to the field of photoelectric detection. Background technique [0002] The four-quadrant detector has the characteristics of high precision, high sensitivity, high spatial resolution, fast response speed, and low noise, so it is widely used in the fields of position detection, positioning, and target tracking. The bias power supply provides bias voltage for the four-quadrant detector to ensure the normal operation of the four-quadrant detector. [0003] In the actual working process, the pulse signal output by the four-quadrant detector is proportional to the energy of the input laser spot. When the spot energy is large, the pulse voltage output by the detector is saturated, which affects the detection of the tar...

AI Technical Summary

Problems solved by technology

[0003] In the actual working process, the pulse signal output by the four-quadrant detector is proportional to the energy of the input laser spot. When the spot energy is large, the pulse voltage output by the detector is saturated, which affects the detection of the target position signal and produces distortion. This will greatly weaken the accuracy of the position signal output by the four-quadrant photodetector

In addition, since the detection responsivity of the four-quadrant detector will change with the change of the ambient temperature, at the same bias voltage and target position, the amplitude of the pulse signal output by the detector will also change under different ambient temperatures. Changes, which in turn affect the detection sensitivity field of the four-quadrant detector

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